. Annual report. 1st-12th, 1867-1878. Geology. 308 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. collected by Dr. Yarrow, Lieutenant Wheeler's Survey west of the 100th Meridian. Zimapan, Mexico, (Prof. W. Dunker coll.), Claus. This species is exposed to considerable variation, so that I was mis- led by the rather indifferent figure of Baird in considering it as dis- tinct from E. caldwelli from Lake Winnepeg; and described it as E. clarMi. The specimens from New Mexico are large and well developed, little and a larger than in the majority of the Kansas specimens. They agree well with Claus's figure of
. Annual report. 1st-12th, 1867-1878. Geology. 308 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. collected by Dr. Yarrow, Lieutenant Wheeler's Survey west of the 100th Meridian. Zimapan, Mexico, (Prof. W. Dunker coll.), Claus. This species is exposed to considerable variation, so that I was mis- led by the rather indifferent figure of Baird in considering it as dis- tinct from E. caldwelli from Lake Winnepeg; and described it as E. clarMi. The specimens from New Mexico are large and well developed, little and a larger than in the majority of the Kansas specimens. They agree well with Claus's figure of the shell, and the appendages are much as he figures them, so that as the species is abundant in New Mexico, I do not doubt but that it extends to Zimapan, Mexico, and thus the name for our most common and widely spread Estheria should be mexicana. of Fi<r. mexicana, en- Claus. This species is allied to the European larged four times. J$. dahalaeensis, but the beak is fuller. I have ventured to place E. durilceri from Zimapan, Mexico, as a syno- nym of this species. Baird's description is almost identical with that of his E. caldwelli; but my New Mexican specimens have the same out- line, the same number of lines of growth, and only differ in having less full and prominent beaks; but the artist may have exaggerated this feature in his drawing, though it is referred to in Baird's description, yet some smaller Kansas specimens have fuller beaks than the New Mexican ones, but, as the locality (Zimapan) and collector (Dunker) are the same as Claus's E. mexicana, there is little doubt but that taking into account the tendency to variation in this species our synonymy is correct. Estheeia morsei Packard. Plate XXIV, fig. 7 ; XXVI, figs. 1, 2. Estheria morsei Packard, Amer. Journ. Sc, II, Ang. 1871. Sixth. Eeport Peab. Acad. Sc. Salem, 56, June, 1874. Hayden's U. S. Geol. Surv. Terr, for 1873, 619, 1874. Morse's First Book of Zoology, 149, fig. 138, D. (No name.) Shel
Size: 1922px × 1299px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishe, booksubjectgeology